I am using turbo tech begi , fpr800 and walbro gss342 fuel pump , but I very tried to adjust on idle rpm afr , I loose out fpr 800 main bolt , on the key , engine no start , adjust begi main big bolt screw to fuel pressure 50psi and lock the main bolt begi , start engine adjust fpr 800 find afr 13 on idle , but can no get , on 13.5 between 14.2 , this is I find final result , the time fuel pressure 48psi on vac , want I lower my base fuel pressure , my afr was higher go to 15 on idle rpm .....